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2 This document is for informational purposes only. Dell reserves the right to make changes without further notice to any products herein. The content provided is as is and without express or implied warranties of any kind. Dell, the DELL logo, and the DELL badge, PowerEdge, and EqualLogic are trademarks of Dell Inc. Microsoft is a registered trademark of Microsoft Corporation in the United States and/or other countries. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell disclaims proprietary interest in the marks and names of others. Copyright 2012 Dell Inc. All rights reserved. Reproduction or translation of any part of this work beyond that permitted by U.S. copyright laws without the written permission of Dell Inc. is unlawful and strictly forbidden. February 2013 (revision 2.3) ii

5 For the Active System 800v configuration at the end of this document, the architecture is provided after results were obtained on the infrastructure using VMware ESXi 5.1 and all the other server, storage, and networking components. 1.4 Disclaimer These sizing recommendations are based on sizing results obtained from Microsoft s Stress and Performance Tool for Lync Each deployment s workload may differ in specific requirements that govern sizing and architecture. The reference architectures present a suggested distribution of virtual machines on physical servers, but other combinations of distribution are possible. The configurations provided in this document provide server and storage sizing guidance and do not provide recommendations for client-side devices. Recommendations for Dell PowerConnect W-Series wireless mobility controllers and access points are provided for the user configurations. These can be replicated or expanded for the larger scenarios provided for user configurations after working with Dell Infrastructure Consulting, as needed. Dell PowerConnect W- Series is qualified with Lync Server and is listed under the qualified networking equipment as part of the Microsoft Unified Communications Open Interoperability Program. Dell provides further details of wireless infrastructure needed at enterprises in these Validated Reference Designs. 5

15 5 10,000 Users 5.1 Overview This reference architecture is for medium/large Lync deployments and can support instant messaging, presence, and audio-video conferencing. For details on VoIP inter-operability with a PBX, VoIP gateway, SIP trunk or other telephony hardware, please contact Dell Infrastructure Consulting. The R620 can be replaced by T620 and the R420 by T420 with equivalent CPU and memory configuration, should tower servers be required. If the larger form factor R720s are required, this replacement is also possible. This solution s server, storage or networking design is highly-available and it is recommended that both storage controllers be used for the storage arrays, and the switches be used in a HA-pair. This Edge Server user model leverages the Microsoft recommendation of 8 cores per users. A reverse proxy is assumed to be present in the customer environment. 5.2 Solution Requirements Number of users 10,000 (Internal 70% and External 30%) High Availability Yes 36 Virtualization Yes 37 Number of Sites 1 Number of Branch Offices Not included in this solution 2 (500 users each) Exchange servers (including UM) Reverse Proxy 5.3 Recommended Solution Server Configuration Microsoft Lync Server Version Enterprise Edition of Lync Server 2010 Physical Server Configuration 38 Front End, Mediation Server VMs in a pool 3 x PowerEdge R620 2 x 8-core Intel Xeon 64 GB Memory 2 x 300GB k SAS 3 x Windows Server 2008 R2 VMs 1 VM per Host 4 vcpus 16 GB Memory 36 Designed to tolerate failure of any one physical machine 37 Excludes Back End SQL Server 38 HyperV failover clustering / vsphere high availability should be configured 15

21 7 25,000 Users 7.1 Overview This reference architecture is for large Lync deployments and can support instant messaging, presence, and audio-video conferencing. For details on VoIP inter-operability with a PBX, VoIP gateway, SIP trunk or other telephony hardware, please contact Dell Infrastructure Consulting. To minimize datacenter footprint, blade servers are used in this architecture. However, if rack servers are preferred, then the M620 blades can be replaced by equivalent R620 servers, with similar CPU and memory. This solution s server, storage or networking design is highly-available and it is recommended that both storage controllers be used for the storage arrays, and the switches be used in a HA-pair. This Edge Server user model leverages the Microsoft recommendation of 8 cores per users and tolerates a single server failure. A reverse proxy is assumed to be present in the customer environment. 7.2 Solution Requirements Number of users 25,000 High Availability Yes 54 Virtualization Yes 55 Number of Sites 1 56 Number of Branch Offices 2 (500 users each) Not included in this solution Exchange servers (including UM) Reverse Proxy 7.3 Recommended Solution Server Configuration Microsoft Lync Server Version Enterprise Edition of Lync Server x PowerEdge M620 Physical Server Configuration 57 2 x 6-core Intel Xeon 64 GB of RAM 2 x 300GB k SAS 6 x Windows Server 2008 R2 VMs 1 VM on each host Front End, Mediation Server VMs in a pool 4 vcpus per VM 16GB Memory per VM 54 Designed to tolerate failure of any one physical machine 55 Excludes Back End SQL Server 56 To scale up in another site, replicate configuration for virtualization and Back End servers from this or other reference configurations in this booklet 57 HyperV failover clustering / vsphere high availability should be configured 21

24 8 Dell Active Infrastructure Dell Active Infrastructure is a family of converged infrastructure solutions that combine servers, storage, networking, and infrastructure management into an integrated and optimized system that provides general purpose virtualized resources. Active Infrastructure leverages Dell innovations including blade servers that use converged LAN/SAN networking that can be easily deployed and operated. This integrated solution accelerates Microsoft Lync Server 2010 delivery and reliability. On Dell Active Infrastructure, Lync Server 2010 ignores the individual hardware configuration of the storage, server, and networks, and for this reason, this design presents the individual storage volume, specific networks, and VM configuration without specifics on the servers, switches, or storage used. Please refer to the Active Infrastructure documentation for information about servers, storage and switches ,000 Users on Active System 800v As a member of Dell Active Infrastructure family, the Active System 800v solution, is a converged infrastructure solution that has been designed and validated by Dell Engineering based on VMware vsphere 5.1. This reference architecture is for small to mid-size Lync deployments and can support instant messaging, presence, and audio-video conferencing for 5,000 Lync users. The solution leverages Active System s server, storage and networking design for a Lync Server deployment, and benefits from that design s high-availability and reliability. The architecture does not consume all of Active System 800v s hardware resources. Therefore, this Lync Server design can be deployed alongside other workloads on the Active System. To add other Lync features, such as VoIP inter-operability with a PBX, VoIP gateway, SIP trunk or other telephony hardware, please contact Dell Infrastructure Consulting. Recommendations are also provided for a mobility controller and wireless access points so that users are able to use Lync over Wi-Fi within the premises. For further information on wireless access setup, please refer to these PowerConnect W-series Validated Reference Designs. 8.2 Solution Requirements Targeted number of users Up to 5,000 High availability Yes 65 Virtualization Full Number of sites 1 Not included in this solution Exchange servers for unified messaging Voice over IP (VOIP) Reverse proxy 8.3 Recommended Solution Server Configuration Microsoft Lync Server Version Enterprise Edition of Lync Server Designed to tolerate failure of any one physical machine. vsphere high availability should be configured. 24

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